Quote:
Originally Posted by OneLeggedRider
No, we didn't include any oddballs or fanatics..  
I'll crunch the numbers for the gear ratios tomorrow but I'm guessing the average to achieve these speeds is about 2.5 or 2.6.  |
You should break down the gear ratio in relation to tire/wheel size. A 2.7 (17/45) on a 110/100-18 rear tire will have a different final drive to that of a 2.7 on a 110/90-17.
As a whole a 2.6-2.7 sprocket ratio on a 18" rear wheel bike with a properly jetted carb at lower altitude (sub 4k ft) and tire pressures pumped up for road use will usually have a top speed right around 65-67mph with full bolt ons, but has an "ideal" max cruise speed of around 50-55mph - aka, not wide open.
The same bike with a 2.5 ratio is capable of topping out at about 70, but can maintain a 60mph max cruise speed with greater ease and less throttle.